| /* |
| * Copyright (C) 2009 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef WebGLBuffer_h |
| #define WebGLBuffer_h |
| |
| #include "CanvasObject.h" |
| #include "WebGLArrayBuffer.h" |
| |
| #include <wtf/PassRefPtr.h> |
| #include <wtf/RefCounted.h> |
| |
| namespace WebCore { |
| |
| class WebGLBuffer : public CanvasObject { |
| public: |
| virtual ~WebGLBuffer() { deleteObject(); } |
| |
| static PassRefPtr<WebGLBuffer> create(WebGLRenderingContext*); |
| |
| // For querying previously created objects via e.g. getFramebufferAttachmentParameter |
| // FIXME: should consider canonicalizing these objects |
| static PassRefPtr<WebGLBuffer> create(WebGLRenderingContext*, Platform3DObject); |
| |
| bool associateBufferData(unsigned long target, int size); |
| bool associateBufferData(unsigned long target, WebGLArray* array); |
| bool associateBufferSubData(unsigned long target, long offset, WebGLArray* array); |
| |
| unsigned byteLength(unsigned long target) const; |
| const WebGLArrayBuffer* elementArrayBuffer() const { return m_elementArrayBuffer.get(); } |
| |
| // Gets the cached max index for the given type. Returns -1 if |
| // none has been set. |
| long getCachedMaxIndex(unsigned long type); |
| // Sets the cached max index for the given type. |
| void setCachedMaxIndex(unsigned long type, long value); |
| |
| protected: |
| WebGLBuffer(WebGLRenderingContext*); |
| WebGLBuffer(WebGLRenderingContext*, Platform3DObject obj); |
| |
| virtual void _deleteObject(Platform3DObject o); |
| |
| private: |
| RefPtr<WebGLArrayBuffer> m_elementArrayBuffer; |
| unsigned m_elementArrayBufferByteLength; |
| unsigned m_arrayBufferByteLength; |
| |
| // Optimization for index validation. For each type of index |
| // (i.e., UNSIGNED_SHORT), cache the maximum index in the |
| // entire buffer. |
| // |
| // This is sufficient to eliminate a lot of work upon each |
| // draw call as long as all bound array buffers are at least |
| // that size. |
| struct MaxIndexCacheEntry { |
| unsigned long type; |
| long maxIndex; |
| }; |
| // OpenGL ES 2.0 only has two valid index types (UNSIGNED_BYTE |
| // and UNSIGNED_SHORT), but might as well leave open the |
| // possibility of adding others. |
| MaxIndexCacheEntry m_maxIndexCache[4]; |
| unsigned m_nextAvailableCacheEntry; |
| |
| // Clears all of the cached max indices. |
| void clearCachedMaxIndices(); |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // WebGLBuffer_h |